Working of Induction Working of Induction Heating by Stead Fast Heating by Stead Fast

Engineers Engineers

http://www.steadfastengg.com/

IntroductionIntroductionWhat is Induction Heating?

IntroductionIntroductionWhy the Induction Heating?

Controlled features

Energy conservation

Non-contact heating

Environmentally friendly Clean heating

Increase production line speeds

ApplicationApplicationIndustrial application

Housing applications

Medical application (precision induction heating)

Project goalsProject goals

build and formulate a basic knowledge about induction heating .

deal with the industry requirements for simplicity ,saving the power consumption, clean heating and fast productivity.

To build a model for induction surface hardening machine.

Carry out some testing on the model.

Background for Induction Background for Induction HeatingHeating

Induction HeatingEddy Current Skin Effect Ferromagnaric

Material

Background for Induction Background for Induction HeatingHeating

ResonanceParallel resonance Tank circuit

Modeling ofModeling of induction induction heatingheating

Design criteriaDesign criteria

Design criteriaDesign criteria There are two serious problems especially become important

when the material starts heating up.

R ↑

µ ↓

The High frequency The High frequency power supply Designpower supply Design

High frequency power supply• Low freq. AC supply DC

source.

Practical designPractical designHigh frequency power High frequency power supplysupply

DC - source High frequency AC source

2MBI 50N-120 FUJI IGBT Module

Practical designPractical designPIC Microcontroller (16F877A)

Practical designPractical designIGBT DRIVERS…Opto-Coupler

IR2110

Practical designPractical designL6384E

Practical designPractical designBOOTSTRAP CAPACITOR

Practical design Practical design Matching Coil

Ferrite transformer, Matching circuit such as an L-

match network.

Practical design Practical design

Induction Heating Work coil.

L=3.2 uHN=4.5 turnsInner diameter =7cm

Induction Heating Capacitor.

ceramic capacitor0.1 uF,450 VTo produce 3uF, 450 V.

ProblemsProblemsPIC microcontroller failure.IR FAILURE.Opto-coupler Constrains.Mismatching between PIC microcontroller and IGBT gate.